75410-1

LOINC code 75410-1 identifies "Hepatitis B virus surface Ag [Presence] in Serum, Plasma or Blood by Rapid immunoassay". Hepatitis B surface antigen (HBsAg) rapid tests are available in test strip and cassette formats from manufacturers in various countries including the US, Singapore, and China. (As of 8/25/2014, no HBsAg rapid test kits are approved for use in the United States). Hepatitis B surface antigen (HBsAg) rapid tests are intended to be used for screening patients for hepatitis B infection and for screening blood donors and blood products. HBsAg is the first serologic marker to appear in the blood of patients infected with hepatitis B, prior to the onset of symptoms. HBsAg can be detected 2-4 weeks in advance of alanine aminotransferase (ALT) liver enzyme levels becoming increased, and 3-5 weeks prior to symptoms. This makes HBsAg rapid tests particularly useful for screening. Follow-up and supplementary testing of any positive samples with other analytical methods (e.g. ELISA, WB)are required however, and negative results do not exclude Hepatitis B virus (HBV) exposure or infection. This term was created for, but not limited in use to, the OneStep HBsAG RapiCard InstaTest kit which uses a chromatographic lateral flow device technique on whole blood, serum, or plasma. Test cassette must be at room temperature prior to testing and then results can be read within 15 minutes.

This code measures Hepatitis B virus surface Ag in Ser/Plas/Bld. It belongs to the MICRO class in the LOINC classification.

LOINC (Logical Observation Identifiers Names and Codes) is a universal standard for identifying laboratory and clinical observations. It is maintained by the Regenstrief Institute and used worldwide for health data exchange.